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Kinetic study of the reaction of OH with HCl from 240–1055 K
Author(s) -
Ravishankara A. R.,
Wine P. H.,
Wells J. R.,
Thompson R. L.
Publication year - 1985
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550171206
Subject(s) - chemistry , arrhenius equation , flash photolysis , atmospheric temperature range , analytical chemistry (journal) , photodissociation , reaction rate constant , kinetic energy , resonance fluorescence , laser , fluorescence , kinetics , activation energy , photochemistry , thermodynamics , optics , physics , chromatography , quantum mechanics
Absolute rate coefficients for the reaction of OH with HCl ( k 1 ) have been measured as a function of temperature over the range 240–1055 K. OH was produced by flash photolysis of H 2 O at λ > 165 nm, 266 nm laser photolysis of O 3 /H 2 O mixtures, or 266 nm laser photolysis of H 2 O 2 . OH was monitored by time‐resolved resonance fluorescenceor pulsed laser–induced fluorescence. In many experiments the HCl concentration was measured in situ in the slow flow reactor by UV photometry. Over the temperature range 240–363 K the following Arrhenius expression is an adequate representation of the data: k 1 = (2.4 ± 0.2) × 10 −12 exp[−(327 ± 28)/ T ]cm 3 molecule −1 s −1 . Over the wider temperature range 240–1055 K, the temperature dependence of k 1 deviates from the Arrhenius form, but is adequately described by the expression k 1 = 4.5 × 10 −17 T 1.65 exp(112/ T ) cm 3 molecule −1 s −1 . The error in a calculated rate coefficient at any temperature is 20%.